Wiring Diagrams for Multiple Receptacle Outlets - Do-it Wiring Diagram for Dual Outlets. Here 3-wire cable is run from a double-pole circuit breaker providing an independent 120 volts to two sets of multiple outlets. The neutral wire from the circuit is shared by both sets. This wiring is commonly used in a 20 amp kitchen circuit where two appliance feeds are needed, such as for a refrigerator and a microwave in the same location. Outlet Wiring - Electrical 101 Receptacle Wiring. In the diagram below, a 2-wire NM cable supplies line voltage from the electrical panel to the first receptacle outlet box. The black wire (line) and white (neutral) connect to the receptacle terminals and another 2 wire NM that travels to the next receptacle. This repeats until the end of the chain.